The Rolls RA102 is a ten channel professional headphone amplifier. Designed with volume controls and 1/8" headphone outputs on the front of the unit, along with 1/4" headphone outputs on the back of the RA102 for each channel. The RA102 has the connections for any professional application. The join function allows many RA102's to be linked together with out any signal loss or impedance issues. It has XLR balance inputs and RCA stereo inputs on the back of the RA102.